cost overrun
noun[CorU]
ukusthefactofspendingmoremoneyon aprojectthan wasplannedin thebudget, or theactualextraamountthat isspent:
Theprojectedcostoverrunon the newsystemisexpectedto be in theregionof $500,000.
Theyattemptedtominimizetheriskofcostoverrun.
huge/massivecostoverruns